Pipe-joint



-v (No Model.)

' M'. o. BOWERS.

PI-PE. JOINT.

No. 877,988. 'Patented Feb. 114, 1888.

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UNITED STATES PATENT innenO MOSES C. BOWERS, OF MOKEESPORT, ASSIGNOR, BY DIRECT AND MESN E ASSIGNMENTS, TO EDMUN D l' C. PENNSYLVANIA.

CONVERSE, OF ALLEGHENY CITY,

PIPE-Johan SPECIFICATION forming part of Letters Patent No. 377,988, dated February 14, 1888.

Application filed January 6, 1886.

To aZZ whom it may concern: Y

Be it known that-I, MOSES C. BOWERS, o McKeesport, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Pipe-Joints; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to all kinds of pipejoints, but is especially applicable in the construction of natural-gasjoints; and its object is to secure a strong tight joint without the necessity of threading the pipes and couplingsleeves.

To enable others skilled in the art to make and use my invention, I will now describeit by reference to the accompanying drawings, in which- Figure 1 is a view of a coupling-sleeve and end of pipe-section detached for the purpose of greater clearness of illustration. Fig. 2 is an enlarged view of the end of one of the pipesections. Fig. '3 is a longitudinal section of a joint.' Fig. 4 is an end View of the couplingsleeve. Fig. 5 is a section on the line :o w of Fig. 8.

Like letters of reference indicate like parts in each.

The coupling sleeve or socket c is provided .with an inwardly-projecting ring, b, midway between its ends, of a proper height to stand viiush with the bore of the pipe-sections when the latter are put in place, the ends of the pipes c abutting against the same, as shown in Fig. 3. On the outside of the sleeve a is a wrought-iron tube, d, the ends of which project beyond the ends of the sleeve-a, forming recesses d', for receivinglead or other cement.

The innersurface of the coupling, except the ring b, is formedor cut lon a spiral, as vindicated at e, forming a curved inclined surface, and on the end of each pipe-section is a corresponding eccentric or projecting part, f. Vhen the pipes are inserted into the coupling, the highest point of the projection f passes into the deepest point of the surface e until theends of the pipes come in contact with the ring b, and then they are rotated upon each other until the inclined surfaces c and f bind, Wedge, or jam tightly together. This pro- Serial No. 187,773. (No model.)

duces a very firm union between the pipes and the sleeve, and if they are jammed tightly enough together they will successfully resist all usual axial strains. fore experienced in natural-gas pipes is that in laying the same a String of pipe often reqnires to be raised from the surface, and inmany couplings now in use the sides of the pipe c are embedded in or surrounded by a layer of lead or other cement. The effect of raising the string by lifting at one end is t0 cause the whole weight to come between the sides of the pipe and the lead packing and to crush the latter to a greater or less extent,

A difficulty heretowhich, when the line comesto a horizontal cement, and this has been a fruitful cause of leakage and probably of some accidents therefrom.

In my improved coupling the whole length. of the inserted ends of the pipe cbears against the inner surface of the coupling, so that there is no danger of any damage being done to the joints by lifting a string of pipe in the'manner stated; but, on the other hand, such a string may be handled for all usual purposes with perfect security. When the pipes are properly secured in the sleeve a, there will be a space, g, Fig. 5, between the vertical sides of the inclines c and f. This space will be filled with the lead or other packing materiahwhich' A is poured or driven into the recess d, and such material will act as a key to hold the pipes from turning backward-if by any reason they should become loosened in the sockets.

If desired, the ring b may be dispensed with,- and in that case the inward thrust of the pipe c when being put in. place will be arrested at the proper point by ashoulder which is formed at the inner end ofthe deepest part of the in clined surface e, the same being indicated at h below the dotted lines in Fig. 4; or', if desired, the pipes may be inserted until their ends strike each other. The coupling a and pipes c, with their inclined surfaces e and f, are more easily and cheaply made by casting, and I prefer to make them in that way.

I am aware that the combination, in a pipejoint, of a cast-iron sleeve for engaging with coupling sleeve the vinternal surface of which the tubesections and a wrought-iron casing or gradually increases in curvature from a given i 5 tube the ends of which extend beyond the point in its circumference, thus giving an ecends of the sleeve is not of my invention, and centric or cam-likeinterior surface, with pipes 5 hence do not claim the same. Y having counterpart projections, substantial] y What I claim as my invention, and desire to as described.

secure by Letters Patent, is In testimony whereof I have hereuntoset my 2o 1. A cylindrical pipecoupling sleeve the hand this 30th day of December, A. D. 1885. internal surface of which gradually increases xo in curvature from a given point in its circum- MOSES C' BOWERS ference, thus givingv an eccentric or cam-like Witnesses: interior surface, substantially as described. THOMAS REYNOLDS, 2. The combination of a cylindrical pipe- JAMES L. DE LONG. 

